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From:   Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To:     linux-kernel@vger.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        stable@vger.kernel.org, Jacopo Mondi <jacopo@jmondi.org>,
        Sakari Ailus <sakari.ailus@linux.intel.com>,
        Mauro Carvalho Chehab <mchehab+huawei@kernel.org>,
        Sasha Levin <sashal@kernel.org>
Subject: [PATCH 4.19 080/247] media: i2c: ov5670: Fix PIXEL_RATE minimum value
Date:   Mon,  1 Mar 2021 17:11:40 +0100
Message-Id: <20210301161035.602663841@linuxfoundation.org>
In-Reply-To: <20210301161031.684018251@linuxfoundation.org>
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From: Jacopo Mondi <jacopo@jmondi.org>

[ Upstream commit dc1eb7c9c290cba52937c9a224b22a400bb0ffd7 ]

The driver currently reports a single supported value for
V4L2_CID_PIXEL_RATE and initializes the control's minimum value to 0,
which is very risky, as userspace might accidentally use it as divider
when calculating the time duration of a line.

Fix this by using as minimum the only supported value when registering
the control.

Fixes: 5de35c9b8dcd1 ("media: i2c: Add Omnivision OV5670 5M sensor support")
Signed-off-by: Jacopo Mondi <jacopo@jmondi.org>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/media/i2c/ov5670.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/media/i2c/ov5670.c b/drivers/media/i2c/ov5670.c
index 53dd30d96e691..62dfdcb6e0bd6 100644
--- a/drivers/media/i2c/ov5670.c
+++ b/drivers/media/i2c/ov5670.c
@@ -2081,7 +2081,8 @@ static int ov5670_init_controls(struct ov5670 *ov5670)
 
 	/* By default, V4L2_CID_PIXEL_RATE is read only */
 	ov5670->pixel_rate = v4l2_ctrl_new_std(ctrl_hdlr, &ov5670_ctrl_ops,
-					       V4L2_CID_PIXEL_RATE, 0,
+					       V4L2_CID_PIXEL_RATE,
+					       link_freq_configs[0].pixel_rate,
 					       link_freq_configs[0].pixel_rate,
 					       1,
 					       link_freq_configs[0].pixel_rate);
-- 
2.27.0